LPC 21XX Problem in interfacing lcd And led

[bondkicha]

I have a problem in interfacing lcd and led in same port(i.e port 0).When i am using lcd alone it works.i connected lcd to (PO.4-P0.7).. when i connect led to( p0.8-p0.15),the lcd is not working..
any one please help me

 

[papunblg]

How the LED is connected?
GPIO pin can source and sink 4mA current.
Publish circuit and code.

 

[bondkicha]

here is the code and proteus design

#include <lpc21xx.h>
#include "delay.h"
#include "Lcd_Header_LPC21xx.h"


int main(void)
{
	
		PINSEL0 = 0x00000000;
		IO0DIR |= 0xFFFFFFFF;
		IO0CLR |=(1<<1);
		lcd_init();
	
		while(1)
		{
			lcd_cmd(0x80) ;
			lcd_string(" WEL 2  LPC213X") ;
			lcd_cmd(0xC0) ;
			lcd_string("   LCD DISPLAY") ;
			delay(10000);
		}
}

 

[avineshb006@gmail.com]

Hi bondkicha
In your circuit diagram there is no connection between the vcc, vdd, vee.
You shoud provide the power supply to that
hear how you are operating the lcd by 4 bit only right?

 

[papunblg]

Check :-
https://www.indiastudychannel.com/p...ther-switch-at-P-P-LPC-toggle-LED-at-P-P.aspx

and

https://www.indiastudychannel.com/p...ached-at-P-P-LPC-ARM-Microcontroller-kit.aspx

Hope this helps

 

[bondkicha]

still not working

 

[avineshb006@gmail.com]

https://www.scribd.com/doc/47644424/TutorialOnInterfacingLCD

in this refer page no 9 for lcd interfacing tutorial..